voluptasmollitia/docs-exp/performance.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/performance](./performance.md)

## performance package

Firebase Performance Monitoring

## Functions

|  Function | Description |
|  --- | --- |
|  [getPerformance(app)](./performance.getperformance.md) | Returns a FirebasePerformance instance for the given app. |
|  [initializePerformance(app, settings)](./performance.initializeperformance.md) | Returns a FirebasePerformance instance for the given app. Can only be called once. |
|  [trace(performance, name)](./performance.trace.md) | Returns a new <code>PerformanceTrace</code> instance. |

## Interfaces

|  Interface | Description |
|  --- | --- |
|  [FirebasePerformance](./performance.firebaseperformance.md) | The Firebase Performance Monitoring service interface. |
|  [PerformanceSettings](./performance.performancesettings.md) | Defines configuration options for the Performance Monitoring SDK. |
|  [PerformanceTrace](./performance.performancetrace.md) | The interface representing a <code>Trace</code>. |